rtla-osnoise-top.rst (2290B)
1=================== 2rtla-osnoise-top 3=================== 4----------------------------------------------- 5Display a summary of the operating system noise 6----------------------------------------------- 7 8:Manual section: 1 9 10SYNOPSIS 11======== 12**rtla osnoise top** [*OPTIONS*] 13 14DESCRIPTION 15=========== 16.. include:: common_osnoise_description.rst 17 18**rtla osnoise top** collects the periodic summary from the *osnoise* tracer, 19including the counters of the occurrence of the interference source, 20displaying the results in a user-friendly format. 21 22The tool also allows many configurations of the *osnoise* tracer and the 23collection of the tracer output. 24 25OPTIONS 26======= 27.. include:: common_osnoise_options.rst 28 29.. include:: common_top_options.rst 30 31.. include:: common_options.rst 32 33EXAMPLE 34======= 35In the example below, the **rtla osnoise top** tool is set to run with a 36real-time priority *FIFO:1*, on CPUs *0-3*, for *900ms* at each period 37(*1s* by default). The reason for reducing the runtime is to avoid starving 38the rtla tool. The tool is also set to run for *one minute* and to display 39a summary of the report at the end of the session:: 40 41 [root@f34 ~]# rtla osnoise top -P F:1 -c 0-3 -r 900000 -d 1M -q 42 Operating System Noise 43 duration: 0 00:01:00 | time is in us 44 CPU Period Runtime Noise % CPU Aval Max Noise Max Single HW NMI IRQ Softirq Thread 45 0 #59 53100000 304896 99.42580 6978 56 549 0 53111 1590 13 46 1 #59 53100000 338339 99.36282 8092 24 399 0 53130 1448 31 47 2 #59 53100000 290842 99.45227 6582 39 855 0 53110 1406 12 48 3 #59 53100000 204935 99.61405 6251 33 290 0 53156 1460 12 49 50SEE ALSO 51======== 52 53**rtla-osnoise**\(1), **rtla-osnoise-hist**\(1) 54 55Osnoise tracer documentation: <https://www.kernel.org/doc/html/latest/trace/osnoise-tracer.html> 56 57AUTHOR 58====== 59Written by Daniel Bristot de Oliveira <bristot@kernel.org> 60 61.. include:: common_appendix.rst